Ilona was the daughter of Péter Bogáthy de Bogáth and Erzsébet Bolgár de Tuzson. The date and place of her birth have not been found.
Her husband was Mihály Gerendi. They were married, but the date and place have not been found. They had no known children.
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| Association | Relationship |
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| Ágnes Kölcsei | mother? |